package priv.mill.arr;


public class DiGui {

	public static void main(String[] args) {
		long l=diguiCal(5);
		System.out.println(l);
		
	}

	private static long diguiCal(int i) {
		
		if(i==1)return 1;
		return i*diguiCal(i-1);
	}
}
